INFO: task syz.3.671:8703 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.671 state:D stack:23936 pid:8703 tgid:8702 ppid:5835 task_flags:0x400140 flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5254 [inline]
__schedule+0x17c4/0x4d60 kernel/sched/core.c:6862
__schedule_loop kernel/sched/core.c:6944 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6959
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7016
rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read_nested+0x9a/0x2f0 kernel/locking/rwsem.c:1663
dbAlloc+0x3a7/0xba0 fs/jfs/jfs_dmap.c:790
diNewExt+0x9af/0x3150 fs/jfs/jfs_imap.c:2261
diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
diAllocAG+0xe86/0x1df0 fs/jfs/jfs_imap.c:1669
diAlloc+0x1d5/0x1680 fs/jfs/jfs_imap.c:1590
ialloc+0x8c/0x8f0 fs/jfs/jfs_inode.c:56
jfs_mkdir+0x193/0xa70 fs/jfs/namei.c:225
vfs_mkdir+0x306/0x510 fs/namei.c:4453
do_mkdirat+0x247/0x590 fs/namei.c:4486
__do_sys_mkdirat fs/namei.c:4503 [inline]
__se_sys_mkdirat fs/namei.c:4501 [inline]
__x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4501
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6dc078efc9
RSP: 002b:00007f6dc170c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f6dc09e5fa0 RCX: 00007f6dc078efc9
RDX: 0000000000000408 RSI: 0000200000000300 RDI: 0000000000000005
RBP: 00007f6dc0811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6dc09e6038 R14: 00007f6dc09e5fa0 R15: 00007fff48304158
Showing all locks held in the system:
3 locks held by kworker/u8:0/12:
1 lock held by khungtaskd/31:
#0: ffffffff8df3d6e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3d6e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8df3d6e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5592:
#0: ffff888033fe00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036c62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
3 locks held by kworker/u9:2/5838:
#0: ffff88807ca44148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline]
#0: ffff88807ca44148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346
#1: ffffc9000408fba0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline]
#1: ffffc9000408fba0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346
#2: ffff888032710dc8 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d4/0x3a0 net/bluetooth/hci_sync.c:331
1 lock held by syz-executor/7724:
5 locks held by syz.3.671/8703:
#0: ffff88807ccfc420 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:508
#1: ffff8880757a3340 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1025 [inline]
#1: ffff8880757a3340 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: filename_create+0x1f8/0x3c0 fs/namei.c:4226
#2: ffff88807c488920 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diAlloc+0x1b5/0x1680 fs/jfs/jfs_imap.c:-1
#3: ffff8880757a1cb0 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diNewIAG fs/jfs/jfs_imap.c:2617 [inline]
#3: ffff8880757a1cb0 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
#3: ffff8880757a1cb0 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diAllocAG+0x7ad/0x1df0 fs/jfs/jfs_imap.c:1669
#4: ffff8880757a25d8 (&jfs_ip->rdwrlock#2/2){++++}-{4:4}, at: dbAlloc+0x3a7/0xba0 fs/jfs/jfs_dmap.c:790
7 locks held by syz.3.671/8715:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:337 [inline]
watchdog+0xfa9/0xff0 kernel/hung_task.c:500
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8715 Comm: syz.3.671 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:unwind_get_return_address+0x68/0x90 arch/x86/kernel/unwind_orc.c:370
Code: 89 df e8 0b 9f b2 00 48 8b 3b e8 83 e7 18 00 85 c0 74 14 43 80 3c 37 00 74 08 48 89 df e8 f0 9e b2 00 48 8b 03 eb 02 31 c0 5b <41> 5e 41 5f e9 0f f8 d7 09 cc 89 d9 80 e1 07 80 c1 03 38 c1 7c a8
RSP: 0018:ffffc90000a08730 EFLAGS: 00000046
RAX: ffffffff8349ce45 RBX: ffffc90000a08800 RCX: 630639fcf116ae00
RDX: 0000000000000001 RSI: ffffffff8d93798e RDI: ffffffff8349ce45
RBP: ffffc90000a087d0 R08: ffffc9000c6f7db0 R09: 0000000000000000
R10: ffffc90000a08798 R11: fffff520001410f5 R12: ffff888076b00000
R13: ffff88813fe3f400 R14: dffffc0000000000 R15: 1ffff920001410f2
FS: 00007f6dc16eb6c0(0000) GS:ffff888126029000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f838a3b4198 CR3: 0000000077dce000 CR4: 00000000003526f0
Call Trace:
arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:56
kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
insert_work+0x3d/0x330 kernel/workqueue.c:2186
__queue_work+0xcd2/0xfb0 kernel/workqueue.c:2341
call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1793 [inline]
__run_timers kernel/time/timer.c:2372 [inline]
__run_timer_base+0x646/0x860 kernel/time/timer.c:2384
run_timer_base kernel/time/timer.c:2393 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
handle_softirqs+0x286/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2034 [inline]
RIP: 0010:vprintk_emit+0x49d/0x590 kernel/printk/printk.c:2422
Code: 0f 84 34 ff ff ff e8 32 eb 1f 00 fb eb 44 e8 2a eb 1f 00 e8 a5 5f a8 09 4d 85 f6 74 94 e8 1b eb 1f 00 fb 48 c7 c7 c0 16 f3 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 3b 31
RSP: 0018:ffffc9000c6f76e0 EFLAGS: 00000246
RAX: ffffffff81a04275 RBX: ffffffff81a040ce RCX: 0000000000080000
RDX: ffffc9000e033000 RSI: 000000000007ffff RDI: ffffffff8df316c0
RBP: ffffc9000c6f77f0 R08: ffffffff8f7d4177 R09: 1ffffffff1efa82e
R10: dffffc0000000000 R11: fffffbfff1efa82f R12: 0000000000000000
R13: 0000000000000036 R14: 0000000000000200 R15: 1ffff920018deee0
_printk+0xcf/0x120 kernel/printk/printk.c:2448
jfs_error+0x11b/0x2c0 fs/jfs/super.c:93
dbAllocBits+0x4d1/0xa60 fs/jfs/jfs_dmap.c:2215
dbAllocDmap fs/jfs/jfs_dmap.c:2034 [inline]
dbAllocDmapLev+0x1bf/0x3c0 fs/jfs/jfs_dmap.c:1988
dbAllocCtl+0x14a/0x9c0 fs/jfs/jfs_dmap.c:1825
dbAllocAG+0x1e6/0xff0 fs/jfs/jfs_dmap.c:1353
dbDiscardAG+0x2df/0x900 fs/jfs/jfs_dmap.c:1608
jfs_ioc_trim+0x429/0x690 fs/jfs/jfs_discard.c:106
jfs_ioctl+0x2b5/0x3d0 fs/jfs/ioctl.c:131
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6dc078efc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6dc16eb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6dc09e6090 RCX: 00007f6dc078efc9
RDX: 0000200000000680 RSI: 00000000c0185879 RDI: 0000000000000006
RBP: 00007f6dc0811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6dc09e6128 R14: 00007f6dc09e6090 R15: 00007fff48304158